Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d4e3f3e09c738a…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 18:35:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: d628a3345f8e693ddf876522983830c5 SHA-1: 62831f3811c71d264cbb868644dfdf6e4ab06ca9 SHA-256: 35d4e3f3e09c738a6e7fce2c3c2804eabe0dc3f4525eb7c61423a0b63ee54dcc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high-risk heuristic firing for a game hack lure, directing users to a suspicious URL. The document body, though partially corrupted, also contains this URL and other links related to game cheats and hacks. This suggests a social engineering tactic to trick users into visiting a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/hack-the-game-coin-master-game-hack PDF link annotation
    • http://www.jsvillas.com.tw/assets/files/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-download-roblox-tshirt_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/pubg-uc-kaise-kamaye_GM1330123889.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/free-robux-games-2021_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://www.jsvillas.com.tw/assets/files/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A2 22536 bytes
SHA-256: efbfe7e3d90f6306ee80131ba785794885fc0b24ae792827e9e79ce586167c8e
font_01_sfnt_off000063e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E0 18428 bytes
SHA-256: 51a0c449eaa86980a1dd870200fb645f17238fc71baeb716fc22b8a77d6de95e

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